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視頻課題：人教版高中英語必修三Unit 4 Astronomy The Science of the Stars遼寧省
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Unit 4 Astronomy: The Science of the Stars
Teaching Plan
Period 1 Warming Up and Reading (How Life Began on the Earth)
教學重點
1. Let students read the passage and learn about the development of the earth.
2. Get students to learn different reading skills, especially the reading ability of understanding implied meaning of the author.
教學難點
1. Enable students to understand the passage and know about the development of the earth.
2. Let students learn how to use different reading skills for different reading purposes. Teaching Aims: 教學目標
1.知識目標
1. Get students to learn the useful new words and expressions in this part: astronomy, system, religion, theory, atom, billion, globe, violent, carbon, atmosphere, unlike, fundamental, harmful, acid, chain, multiply, oxygen, exist, thus, dioxide, puzzle, solar system, in time, lay eggs, give birth to, in one‟s turn, carbon dioxide, prevent. . . from
2. Let students learn about the development of the earth.
2.能力目標
1. Develop students‟ reading ability and let them learn different reading skills.
2. Enable students to know about the development of the earth. 3. Let the students learn the sequence of life‟s origins and process 3.情感目標
1. Train students‟ interest in science and stimulate their love for astronomy.
2. Develop students‟ sense of cooperative learning.
3.Enable the students know the importance of protecting our environment and our earth . Teaching methods:
a> Fast reading, careful reading, extensive reading b> Reading and practicing Teaching aids: A slide projector
Teaching procedures and methods StepⅠ Greetings Say hello to everyone. StepⅡ warming up
Today, we will come to unit4 astronomy. Before that,let‟s look at a picture on the screen. Show the students a picture of a girl who is looking at the
sky. Have a free talk with students.Let students brainstorm the following question.
T:Can you find other adjectives to describe the beautiful sky? S：fantastic charming attractive ...
T: would you like to enjoy the beautiful scenery in the sky? S：Yes, We „d like to.
Show students a video and enjoy the beautiful scenery in the sky in a closer distance.
T:Now ,are you interested in astronomy? students show their great interest in it.
Step Ⅲ Pre-reading
The teacher says something about the definition of astronomy and astronomer and then ask them some questions.
Q: 1> If you were an astronomer ,what else would you like to know about the universe?
2> How the universe began? 3> How the life begin on the earth?
Most of the students want to know how life began on the earth. T: Of course, each religion and each culture has their own ideas about how life began. Now, I‟m going to tell you some legends about the origin of universe and life. (Pangu separates the sky from the earth) (Nuwa makes men from mud )(In Bible ,
peopele believe the world and the whole universe was created by God.)
T: Do you think so? However, the scientists have a different idea. They believe the universe began with a big bang. Let‟ s watch a video and try to know more about a big bang . Do you want know more information about it?
Now ,let‟s come into the reading passage. Step IV Fast reading
Read the text fast and then tell me the main idea of each paragragh. Para1 A widely accepted theory about the formation of __________. Para2 The formation of _________. Para3 The importance of _____ for life.
Para4 The development of ________ ______ on the earth. Para5 The appearance of ______ and their effects on the earth. Analyse the text:
If the text can be divided into two parts,how can we divided according to the different main ideas? Part1
Water is important for life to begin to develop. Part2
The development of the living things.
Pay attention to the words in red. Students can get the answers easily.
Part1 contains para1 para2 and para3. Part 2 contains para4 and para5. Step V Careful reading
Now, read the text carefully and loudly for a second time and then comeplete the fills in the pictures according to the order of evolution of life .If you can‟t get the answers quickly and easily, you can make use of the pictures. Part1: (para1 ,2, 3)
Pictuer1 :According to a widely ________________, the universe began with a ________that threw________in all directiongs.
Picture2:After the “Big Bang”, the earth was just _____________. Picture3:The earth became so______that it was not clear whether the shape would last or not. It _________ loudly with ____________. Picture4:They produced______________________and other gases, which made the earth‟s ___________.
Picture5:As the earth cooled down, _____ began to appear on its ________.
Then ask students to talk about the correct order of the development with the teacher together from paragraph 1 to paragraph 3.
cool down
Big bang a dust of cloud
solid globe
produce the gases and water vapours atmophere
water
Life
began
Part2(para4, 5)
Picture1:Many millions of years later,the first ____________________ appear on the ________________. Picture2:This
encouraged
the
later
development
of______________________.
Picture3:Next,_____plants began to grow on _____,they were followed by_________.
Picture4:Some were______. Others, called __________, were able to live _______as well as __________.
Picture5: When the plants grew into ___________, _________ appeared for the first time. They produced young generally by ____________. Picture6: Later, some huge animals, called _________, developed. They laid eggs too.
Picture7:But when dinasours disappeared, __________became more important.
Picture8:Finally some small _____ animals, now with ____________, appeared and spread all over the earth.
Then talk about the correct order of the development of life together by filling the blanks in the diagram.
1._______ on
the
surface of water.
2 ._______ and all
sorts of fish
4. ____ (on land) 5. Amphibians (on land as well as
Step VI: Extensive reading
Think about what you have read and work in groups to discuss these questions .
1. Why did the plants grow before the animals came?
2. 2. Why is it wrong to show films with dinosaurs and people together?
Step: ⅦText Retelling
There is a video about the develpment of life,but the video has no sound. You are the voice actor or you are the reporter of the video.
The student who gets any idea while watching the video can stand up by yourself.
StepⅧ: Discussion
T:Look at a picture and anwer my queations? What happened to the earth?why?
What will happen when we put too much CO2 into the atmosphere? (discussion)
Ss: greenhouse effect,glacier melt ,the rise of the sea level , global warming and so on.Animals will die out. Plants will die out. There will be
6. Plants grew into _______. 7. _____
3. Green ____ on land
8. __________ (on land)
9. __________ (on land) 10.____________
(small clever animals )
no life onthe earth.
T: As a student,what little things can we do for our earth? The pictures can help you get some clues.
Ss: we can use solar system , plants more trees, recycle rubbish and so on. T: Anyhow, from now on,no matter what we do every day, we had better do what we can do to protect our earth. Whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved. StepⅨ:Homework:
Write a passage on what should be done to protect the earth with about 100 words. Two or three suggestions are expected to be given. At last,if we still have some time, enjoy the earth song.
板書設計
Unit 4 Astronomy: the science of the stars
Warming up and reading
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